Vahagn M.
Full Stack Java Engineer | GenAI Integration (OpenAI, Gemini, LLMs)
Senior Java & AI Integration Engineer with 5+ years of experience building scalable backend microservices and integrating GenAI (LLM APIs, OpenAI, Gemini, Anthropic). I specialize in enterprise backend applications using Java, Spring Boot, Microservices, Kafka, Docker, Kubernetes, and AWS. I have hands-on experience incorporating AI models (prompt engineering, RAG, custom tool/function calling) into production-grade systems. Tech Stack: • AI & GenAI: Gemini API, OpenAI API, Anthropic Claude API, LLM Integrations, RAG, Prompt Engineering, Bounding Box/Segmentation AI Workflows • Backend: Java, Spring Boot, Spring Cloud, Hibernate, JPA • Architecture: Microservices, REST APIs, Event-Driven Architecture, Hexagonal Architecture • Messaging & Data: Apache Kafka, Redis, PostgreSQL, MongoDB, MySQL • Cloud & Infrastructure: AWS (EC2, EKS, S3, RDS), GCP, Docker, Kubernetes, Terraform • Monitoring & Performance: Datadog, Caching, Async Processing, Low-Latency Optimization • Security: OAuth2, OIDC, Keycloak • DevOps & CI/CD: Azure DevOps, Git Worktrees, Jenkins, CI/CD Pipelines Currently open to remote backend and GenAI integration opportunities.
Earnings and projects
Last 6 months ÷ 5 months active (since Jun 2026)
Last 6 months: $26k
Billed in all: $28,131$28k
$26k in the last 6 months
Earnings, last 30 days
Skill rankings: Top 2% in MongoDB
Ranked by MRR among everyone on Upwork with the skill.
- #46Redis1,774 freelancers · 🇦🇲 #2Top 3%🇦🇲#2 of 43
- #49Spring Framework880 freelancers · 🇦🇲 #2Top 6%🇦🇲#2 of 8
- #52Apache Kafka981 freelancers · 🇦🇲 #3Top 5%🇦🇲#3 of 20
- #63AI Model Integration1,618 freelancers · 🇦🇲 #1Top 4%🇦🇲#1 of 9
- #67Azure DevOps2,096 freelancers · 🇦🇲 #1Top 3%🇦🇲#1 of 13
- #71Terraform2,052 freelancers · 🇦🇲 #2Top 3%🇦🇲#2 of 22
- #84Microservice2,217 freelancers · 🇦🇲 #4Top 4%🇦🇲#4 of 31
- #107Google Cloud Platform2,939 freelancers · 🇦🇲 #1Top 4%🇦🇲#1 of 22